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Related Experiment Video

Updated: Jan 11, 2026

Cone Beam Intraoperative Computed Tomography-based Image Guidance for Minimally Invasive Transforaminal Interbody Fusion
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Radiation Free 3D Optical Topographic Image-Guided Navigation for Spine Surgery-A Cadaveric Study.

Josh E Schroeder1, Joseph Weinstein2, Tushal Patel3

  • 1Hadassah Hebrew University Medical Center, Jerusalem Israel.

Clinical Spine Surgery
|November 17, 2025
PubMed
Summary

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Robotic-Assisted Fixation and Cementation for Sacral Insufficiency Fractures: A Case Series and Technical Note.

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Robotic-assisted versus fluoroscopy-guided sacroiliac screw fixation: A retrospective comparative study.

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Isolated Atypical Pedicle Stress Fractures in Patients on Prolonged Bisphosphonate Therapy: Report of Two Cases and a Literature-Based Proposal for Diagnostic Criteria.

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This study shows that the PathKeeper optical navigation system is a feasible and 100% accurate tool for thoracolumbar pedicle screw placement. This radiation-free technology offers a safe solution for spine surgery, even for inexperienced surgeons.

Area of Science:

  • Spine surgery
  • Medical device technology
  • Surgical navigation

Background:

  • Pedicle screw placement is critical for spinal stability.
  • Traditional methods may involve radiation exposure.
  • Advancements in navigation systems aim to improve accuracy and safety.

Purpose of the Study:

  • To evaluate the feasibility and accuracy of the PathKeeper optical 3D spine navigation system.
  • To assess real-time imaging and navigation for thoracolumbar pedicle screw placement.
  • To determine the system's effectiveness in a preclinical cadaveric model.

Main Methods:

  • A preclinical cadaveric study involving 8 cadavers.
  • Placement of 90 pedicle screws using the PathKeeper optical navigation system.
Keywords:
3D navigationimage-guided surgerymachine visionoptical topographic imagingreal-time trackingspinal navigation

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  • Assessment of accuracy using the Gertzbein-Robbins scale and postoperative CT imaging.

    • Main Results:

    • 100% accuracy in pedicle screw placement (90 screws) across T1-L5 vertebrae.
    • All screws achieved Gertzbein-Robbins grades A or B.
    • The system demonstrated 100% accuracy even with surgeons inexperienced with navigation.

    Conclusions:

    • The PathKeeper optical navigation system is feasible and highly accurate for pedicle screw placement.
    • The system offers a user-friendly interface with a swift learning curve.
    • Optical navigation presents a promising, safe, and radiation-free solution for spine surgery.